When buying a machine tool, it’s easy to get carried away. The excitement of purchasing a fancy new mill from Tormach makes you want to buy all the tools and accessories under the sun. Eventually, your budgeting conscience starts yelling, and you’ve got to draw a line somewhere. Often, when this line gets drawn, machine owners will skip buying a 4th axis, figuring they can do everything needed with some workholding ambition. While that might sometimes be true — though hardly worth the effort — here are three big reasons it’s valuable to consider a 4th axis.